Turning down your water heater is generally safe and can lead to significant energy savings. It’s a common and effective way to reduce your utility bills and prevent scalding injuries. You can safely lower the temperature setting without compromising your hot water supply for most household needs.
Is It Safe to Turn Down a Water Heater for Energy Savings?
Yes, turning down your water heater is a safe and cost-effective strategy for reducing energy consumption. Most modern water heaters are set to higher temperatures than necessary for typical daily use. Lowering the temperature can prevent scalding, reduce energy waste, and ultimately save you money on your utility bills.
Understanding Water Heater Temperature Settings
Water heaters come with a thermostat that controls the water temperature. The default setting is often around 140°F (60°C). This temperature is high enough to prevent the growth of bacteria like Legionella, but it also poses a scalding risk, especially for children and the elderly.
Why is 140°F the default?
- Bacteria Prevention: Higher temperatures help inhibit the growth of harmful bacteria in the tank.
- Meeting Demand: It ensures enough hot water for high-demand periods.
- Historical Standards: It’s been a long-standing recommendation.
However, for most households, a lower temperature is perfectly adequate and much safer.
What is the Safest Temperature for Your Water Heater?
The U.S. Consumer Product Safety Commission (CPSC) recommends setting your water heater to 120°F (49°C). This temperature is hot enough for most daily tasks like showering, washing dishes, and doing laundry. It significantly reduces the risk of scalding injuries.
Benefits of a 120°F Setting:
- Reduced Scalding Risk: Significantly lowers the chance of burns.
- Energy Savings: Uses less energy to heat water to this temperature.
- Extended Tank Life: Less stress on the heating elements.
Even at 120°F, you can still get a good supply of hot water for your needs. If you have specific concerns about bacteria, consult your water heater’s manual or a professional.
How to Safely Turn Down Your Water Heater
Adjusting the temperature on your water heater is a straightforward process. The exact steps may vary slightly depending on your model, but the general procedure is similar for most electric and gas water heaters.
Steps for Adjusting the Thermostat:
- Locate the Thermostat: For electric water heaters, you’ll typically find two thermostats behind access panels on the side of the tank. For gas water heaters, the thermostat is usually a dial located on the gas control valve near the bottom of the unit.
- Turn Off Power/Gas: Crucially, before making any adjustments, turn off the power to an electric water heater at the circuit breaker. For a gas water heater, turn the control knob to the "Pilot" or "Off" position.
- Adjust the Temperature: For electric models, you’ll need to remove the access panels and insulation. Use a screwdriver to adjust the temperature setting on the thermostat. For gas models, simply turn the dial to your desired temperature.
- Restore Power/Gas: Once adjusted, replace the access panels and insulation on electric heaters. Turn the power back on at the breaker. For gas heaters, turn the control knob back to the "On" position and relight the pilot light if necessary.
- Test the Water: Wait a few hours for the water to heat up. Test the water temperature at a faucet furthest from the water heater to ensure it’s at your desired level.
Important Safety Note: Always refer to your water heater’s owner’s manual for specific instructions and safety precautions. If you are uncomfortable performing these steps, it’s best to hire a qualified plumber.
How Much Can You Save by Turning Down Your Water Heater?
Lowering your water heater temperature can lead to noticeable savings on your energy bills. The U.S. Department of Energy estimates that you can save 3-5% on your water heating costs for every 10°F (5.6°C) reduction in thermostat setting.
Consider this: heating water accounts for about 15-20% of your total home energy use. By reducing this demand, you can see a significant impact on your monthly expenses. For an average household, this could mean saving tens to over a hundred dollars per year.
Example Savings:
If your annual water heating bill is $500, and you lower your thermostat by 20°F (from 140°F to 120°F), you could save approximately 6-10% of that cost. This translates to $30 to $50 in annual savings. These savings add up over time and contribute to a more energy-efficient home.
Are There Any Risks to Turning Down Your Water Heater?
While generally safe, there are a few potential risks to be aware of when lowering your water heater’s temperature. These are typically minor and can be managed with proper understanding.
Potential Risks:
- Bacterial Growth: The primary concern is the potential for bacteria like Legionella to grow in water temperatures below 120°F. However, the risk is very low in most residential settings, especially if the water is used regularly.
- Insufficient Hot Water: If you have a very large household with high hot water demand, setting the temperature too low might occasionally result in running out of hot water during peak usage times.
- Dishwasher Performance: Some older dishwashers may require higher water temperatures to effectively clean dishes. Check your dishwasher’s manual for its recommended water inlet temperature.
Most modern water heaters and dishwashers are designed to function well at 120°F. Regular use of hot water also helps to flush the tank, further reducing any bacterial concerns.
People Also Ask
### Can I set my water heater to 110°F?
Yes, you can set your water heater to 110°F. This temperature is even lower than the recommended 120°F and will result in greater energy savings. However, it increases the risk of bacterial growth, though this is still minimal for most households with regular water usage. It’s also more likely to result in insufficient hot water for high-demand situations.
### Will turning down my water heater damage it?
No, turning down your water heater’s temperature will not damage the unit. In fact, it can prolong its lifespan by reducing the stress on heating elements and the tank itself due to lower temperatures and less frequent, intense heating cycles. It’s a safe adjustment to make.
### How often should I flush my water heater tank?
You should aim to flush your water heater tank at least once a year to remove sediment buildup. This sediment can reduce efficiency and potentially shorten the lifespan of your water